Ruby网络编程（1）

Ruby网络编程（1）

编程 Ruby Socket thread

关键字： TCPSocket TCPServer  
这个例子是这样的：客户端连上服务器后，服务器向客户端的终端显示服务器的时间，然后将来自客户端的网络连接养关闭。 
 


my_tcp_server.rb 

 require 'socket'               # Get sockets from stdlib

 server = TCPServer.open(2000)  # Socket to listen on port 2000
 loop {                         # Servers run forever
   client = server.accept       # Wait for a client to connect
   client.puts(Time.now.ctime)  # Send the time to the client
   client.puts "Closing the connection. Bye!"
   #client.write("dd")
   client.close                 # Disconnect from the client
 }

server.accept这个方法会一直挂着，直到有客户端连上来为止。 

my_tcp_client.rb 

 require 'socket'      # Sockets are in standard library

 hostname = 'localhost'
 port = 2000

 s = TCPSocket.open(hostname, port)

 while line = s.gets   # Read lines from the socket
   puts line.chop      # And print with platform line terminator
 end

 #streamSock.send( "Hello\n" )
 #str = streamSock.recv( 100 )
 #print str

 s.close               # Close the socket when done

然而大多数的服务器是支持多个客户端的连接的，在Ruby中可以用线程来很容易地做到这一点。 

我将以上的my_tcp_server.rb中的服务器代码修改一下： 

 require 'socket'                # Get sockets from stdlib

 server = TCPServer.open(2000)   # Socket to listen on port 2000
 loop {                          # Servers run forever
   Thread.start(server.accept) do |client|
     client.puts(Time.now.ctime) # Send the time to the client
     client.puts "Closing the connection. Bye!"
     client.close                # Disconnect from the client
   end
 }

这样的话，每有一个客户端连接上来，就会在服务器端启动一个线程来处理请求。